System.IO.TextReader.ReadBlock C# (CSharp) Method

        public virtual int ReadBlock(char[] buffer, int index, int count)
        {
            int i, n = 0;
            do
            {
                n += (i = Read(buffer, index + n, count - n));
            } while (i > 0 && n < count);
            return n;
        }

        public List<string> ParseText(TextReader pReader)
        {
            result.Clear();

            int	count = 0;
            do
            {
                count = pReader.ReadBlock(buffer, 0, BUFFER_SIZE);
                for (int i = 0; i < count; ++i)
                {
                    char c = buffer[i];
                    if (char.IsWhiteSpace(c))
                    {
                        ParseWhitespace();
                    }
                    else if (Contains(punctuation, c))
                    {
                        ParsePunctuation(c);
                    }
                    else if (char.IsLetterOrDigit(c))
                    {
                        ParseLetter(c);
                    }else{
                        ParseLetter(c);
                    }
                }

            } while(count == BUFFER_SIZE);
            return result;
        }